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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A331340 a(n) = n! * [x^n] 1 / (1 + Sum_{k=1..n} log(1 - k*x)).

Table of values

n a(n)
0 1
1 1
2 23
3 1872
4 371524
5 147316050
6 102823452318
7 115685840003328
8 196669439127051840
9 480847207762313690400
10 1626231663646322798946000
11 7372321556702072183715972096
12 43653032698484678876818157764224
13 330351436922959495109028135649934640

List of values

[1, 1, 23, 1872, 371524, 147316050, 102823452318, 115685840003328, 196669439127051840, 480847207762313690400, 1626231663646322798946000, 7372321556702072183715972096, 43653032698484678876818157764224, 330351436922959495109028135649934640]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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